raw_atomic_..._and_relaxed(9)

📦 version 7.3.1, in nixpkgs unstable

💅 raw_atomic_..._and_relaxed(9) — like, the Kernel API Manual one, bestie

okay so. welcome to the group chat that is the Kernel API Manual, and today's main character is raw_atomic_..._and_relaxed(9). yes the title is doing a little ellipsis thing, it's giving "and friends" energy, we'll get to that. 🎀

✨ NAME ✨

raw_atomic_long_fetch_and_relaxed — atomic bitwise AND with relaxed ordering. she's an AND operator and she's chill about it. no cap.

🦋 SYNOPSIS 🦋

long raw_atomic_long_fetch_and_relaxed (long i , atomic_long_t *v );

literally just two things in, one long out. ship it. 💜

🌸 ARGUMENTS 🌸

  • i — a long value. that's it, that's the whole argument. iconic.
  • v — a pointer to atomic_long_t. you're pointing at the thing we're about to mess with. handle with love. 🫶

🔥 DESCRIPTION 🔥

okay so what she does: atomically updates v to (v & i) — yes the bitwise AND, yes with i — and she does it with relaxed ordering. no extra fence drama, no "wait for everyone else", just the operation, atomically, done. that's the vibe check and she passed. ✨

big note, bestie: she's safe to use in noinstr code. but — and hear me — prefer atomic_long_fetch_and_relaxed everywhere else. raw_ is the noinstr-safe flavor, not the everyday casual one. iykyk 💅

💖 RETURN 💖

the original value of v. like, the value before the AND. the pre-glow-up version. she gives you the before pic, not the after. 😭👑

🌈 SEE ALSO 🌈

first up, the source, absolutely gotta give credit:

  • Kernel file ./include/linux/atomic/atomic-long.h

and now. the family. the whole entire family. buckle up bestie, she's got relatives:

yeah. that's the whole roster. every single one of them showed up to the party and they all ate. 🔥👑

🧚 sign-off 🧚

so anyway, this lil page lives in ./include/linux/atomic, it's part of the Kernel API Manual (that's the manual name, writing it down so we don't forget 💖), and it's dated October 2026. go forth and AND atomically, bestie. mwah. 💅✨🍓

📦 where this page comes from